This paper presents a practical approach for project management information system (PMIS) requirements analysis from a system operation point of view. Previous approaches rarely focus on reducing mismatch between the requirements analysis with systems design and implementation. We propose a PMIS requirement acquisition rule and a requirement analysis process to better understand the complex requirements of PMIS and obtain refined requirements, which helps to develop a high-quality PMIS with reduced overall systems development time. A case study approach is then used to explore the effect of proposed approach. The result shows that the approach is superior at high confidence level.